During the stay in the port of Osaka, Japan, a Panamax container met a fault of fuel oil system and the eleven-bar-pressure oil spread from the mechanical seal of the homogenizer to shaft ball bearing which caused the latter to be caught fire and burnt completely. The fire soon spread furiously to the purifier cabin which located on the 4(superscript th) floor in the engine room. As the automatic smoke detector detected the fire, the fire alarm sounded immediately. All the engineer and crew rushed to engine control room and found that the engine room was full with dense smoke. Besides, light blackout was caused by short circuits of cables which were not recoverable. After the fixed fire fighting system was activated, the fire in the purifier cabin was finally extinguished. It took about three weeks to do the repair work which caused a serious loss to the ship's company.